Machine for cutting files or rasps



(No Model.)

A. WEED. MACHINE FOR CUTTING FILES OR RASPS.

No. 578,379. Patented Mar. 9, 1897.

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, ALFRED WEED, OF ANDERSON, INDIANA.

MACHINE FOR (SUTTING FILES OR RASPS.

SPECIFICATION forming part of Letters Patent No. 578,379, dated March 9,1897. Application filed April 4, 1896- Serial No. 586,218. We model.)

To all whom it may concern."

Be it known that I, ALFRED W'EED, a citizen of the United States,residing at Anderson, in the county of Madison and State of Indiana,have invented certain new and useful Improvements in Machines forCutting Files or Rasps, of which the following is a specification.

Attempts have been made from time to time to produce by machinery theeffect in cutting files and rasps of the best character of handcutting,but in most instances with only partial success. In some cases theapparatus has been of such acharacter as to permit acertain play of thecutting-toolas it enters the file-blank; but this has generally beensecuredby a loss of the positive guiding of the toolholder under theaction of the spring or hammer. I have discovered that it is possible toproduce a machine-cut file or rasp having a regularity, uniformity, andefficiency greater than that of the best hand-cut article with atool-holder moving in a positive guide, which guide has, however, acapacity to move to a slight extent, and these features I have embodiedin the improved mechanism illustrated in the accompanying drawings, inwhich- Figure 1 is a sectional elevation of a filecutter embodying myimprovements. Fig.2 is a frontelevation, and Fig. 3 is a cross-sectionalview.

I designates the frame of the machine,having a bed-plate J ,which ismovable to carry the file or rasp blank X in a manner which it is notnecessary to describe. Formed integral with or connected to the frame Iin any suitable manner is a head J, which is above and overhangs thebed-plate. This head is provided with a circular chamber which serves asa seat for a-correspondingly-shaped guideblock D, and channels 1 2 areformed in the head to extend from the chamber thereon to the top andbottom of the head, respectively. The guide-block D is provided with apassage through which and through the channels 1 2 passes the plunger ortool-holder A,

which extendsabove the head J and has an upper inclined face w. The saidplunger also extends below the head and is preferably provided with aninclined socket for reception of a cutting-tool m, which hasa beveledcutting edge '0 and is secured in position by a setscrew 02. The plungerA fits closely the passage in the guide-blank to prevent its lateralmovement in said passage, but the channels are each formed slightlywider than the plunger in order that the plunger may be moved laterallytherein when the guide-block is oscillated. The channels 1 2 areslightly out of alinement, and the sides of each constitute bearings 34..

A gum spring E is confined between the upper and lower inclined end toof the plunger A and a washer a within a bracket or yoke is. Thetendency of this spring, resulting from its position with respect to theplunger, is to throw the plunger downwardly toward the bed-plate, andalso to keep the plunger in contact with the bearings 3 4 of thechannels 1 2, which is the normal position of the plunger.

A screw 1) extends through the cross-piece of the bracket is and bearsupon the washer a, whereby the gum spring may be compressed to anydesired degree to regulate the force of the blow of the cutting-tool.

Lug 0 extends from the side of the plunger A, through recesses in theend of the guideblock D, into a recess in the head, and against this lugacts eccentric cam e,within the recess of the head and supported upon ashaft B, projecting into the interior of said recess from the exteriorof the head. This cam is arranged to make contact with the lug c andgradually lift the plunger against the action of the spring E and thenpass from beneath the lug and permit the plunger to descend suddenlyunder the action of the spring to bring the cutting-tool m into contactwith the blank X. As the tool is thus brought against the face of thefile-blank it is not only forced downward into the blank, but owing toits bevel-face o it tends to move forward at the same time, such forwardmovenient being accomplished by the rocking or oscillation of theguide-block D and limited by the bearings 4 3 of the channels 1 2, re-

spectively.

It will be seen from the above that while the plunger is allowed toswing forward there is absolutely no play of the plunger in itsguide-block, and consequently there can be no irregular or uncertainmotion and the file is cut with great regularity and uniformity.

It will be evident that the guide-block D may be supported in differentWays, so as to have a'movement in permitting the proper action of theplunger A, and that it is not absolutely necessary that the tool m shallbe in an inclined position providing the end of the tool and itsinclined face i; occupies the same position as is necessary to give therequired movement. It will also be evident that any suitable kind ofspring E may be employed and that any of the usual means may be employedinstead of the spring for causing the downward movement of the plunger.

IVhat I claim is- 1. In a file-cutting machine, the combination With theframe, of a guide free to oscillate upon the frame, a plunger carrying abeveled-edge cutting-tool and adapted to reciprocate in the guide, meansfor reciprocating the plunger, mechanism for moving the guide in onedirection when the plunger is being elevated, and devices for limitingthe oscillation of the guide, substantially as described.

2. In a file-cutting machine, the combination With the frame, of a guidefree to oscillate upon the frame, devices for limiting the oscillationof the guide, a plunger carryinga beveled-edge cutting-tool and adaptedto reciprocate in the guide, a compression-spring set at an angle withrespect to the plunger for moving it in one direction, substantially asdescribed.

'3. In a file-cutting machine, the combination With the frame, of aguide free to oscillate upon the frame, bearings for limiting theoscillation of the guide, a plunger provided With an inclined socket andadapted to reciprocate in the guide Without lateral play, a beveled-facecutting-tool secured in the socket of the plunger, means forreciprocating the plunger, and devices for maintaining the plunger incont-act with one of its bearings When it is elevated, substantially asdescribed.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ALFRED WVEED.

WVitnesses:

MARcELLUs A. CHIPMAN, C. M. KELTNER.

